Simplify the blind hole structure, use standardized hole diameter (such as 4mil), avoid cross-step blind holes and reduce the difficulty of pressing
- Standardized Diameter: All microvia blind holes will utilize a standardized finished diameter of 4 mil (0.10mm). This drastically improves laser drill consistency, registration accuracy, and overall yield.
- Staggered Design, No Cross-Step Holes: Blind vias will only connect adjacent layers (e.g., L1-L2, L2-L3, L3-L4). Cross-step blind holes (connecting non-adjacent layers like L1-L3) are completely eliminated. This simplifies fabrication sequences, removes complex plating challenges, and enhances reliability.
- Sequential Depth Control: Laser drilling parameters will be carefully tuned for each specific depth (e.g., L1-L2 drill recipe vs. L2-L3 recipe) but only into the directly adjacent dielectric layer. This ensures clean hole walls and reliable plating.
- Staggered Landing Pads: Landing pads on the target layer will be designed with sufficient annular ring to accommodate positional tolerance, but pads for deeper layers will be placed strategically to avoid imposing unrealistic density requirements or creating "tear-drop" effects on inner layers. This improves fabrication margin.
1. who are we?
We are based in Jiangsu, China, start from 2016
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Shaft Couplings, Flexible Couplings, Rigid Couplings, Polyurethane Elastic Pad, Inner Toothed Nylon Sleeve
4. why should you buy from us not from other suppliers?
With 10 years of professional coupling production experience, over a hundred CNC equipment, a professional production, research and development, after-sales team, and a first-class testing and research and development center in China.
24H online , Please feel free to contact us if you have any questions.
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